My group has been using a rule ever since we started playing D&D 4e. I did a search and can not find a reference to it anywhere. I need to know if I missed the reference to it or if we have accidentally made a house rule.

This is the Rule:
Whenever a character is bloodied for the first time in a combat encounter, that character may immediately take a healing surge as an interrupt in response. This has been applied equally to monsters too if they have healing surges. A character can only do this once per encounter and only when they are bloodied for the first time. They must also take a short rest between encounters to be able to use this. This does not count against Second Wind.

Thanks. This is what I am concluding. We think as a group we may have very early on misread or misinterpreted the Second Wind and this came out of it. We are going to drop this from our gaming. It makes the characters too hard to fight.
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Acedrummer_CLBJan 21 '11 at 16:52

@Ace, np - it happens. My worst problem is still trying to use D&D3e rules in D&D4. I have a hard time forgetting things, I still instinctively grab the dice to take an AOO against someone standing up from prone :)
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Pat LudwigJan 21 '11 at 16:57

Yeah, after another search, combined with what is shown here, I and the group have concluded that what we are using is an accidental house rule. I have talked with he group and we will be dropping it from now on.
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Acedrummer_CLBJan 21 '11 at 16:49